C# - convert 'days old' to date of birth

[sskofid11]

(C#)

Hi,

I need to convert how many 'days Old' someone is (e.g. 3 years old = 1,095 days old) to a 'date of birth' answer i.e. dd/MM/yyyy. I have tried many different ways how to do this, but to no avail (yet) - e.g. using a mathematical formula but it gets a bit complicated, especially when considering how to implement that into C# (for a beginner, at least).

What is in the box below is one of the many ways I have tried thus far. I know it's wrong but it's one of many of my attempts. What is the simplest way to go about this (assuming 1 year is 365 days, if the computer doesn't have it's own automated calculation to include leap years)?

public static string GetBirthDate(int daysOld)
        {
            var dateToday = Convert.ToInt32(DateTime.Now);
 
            var calc = (dateToday - 365.25 * daysOld);
 
            return Convert.ToString(calc);
        }

Finally, if I am to include leap years, would the adjustment to simply be to take into consideration that 1 year = 365.25 years? Or would there be more complexity to this?

Kind regards.

[Luk3r]

This would be the easiest way in my opinion:

DateTime birthDate = DateTime.Now.AddDays(-1095);

[sskofid11]

this doesn't seem to work